• complementary vs complimentary
• elicit vs illicit
• fish vs fishes (fish when talking about several individuals of one species; fishes when talking about many fish of several different species)
• led vs lead ('lead' commonly used where 'led' is meant)
• less vs fewer (less for non-countable; fewer for countable)
• practice (noun) vs practise (verb)
• principle (1. a general truth or assumption from which to argue. 2. a scientific law, especially one that explains a natural phenomenon or the way a machine works. 3. a general rule of morality that guides conduct; the having of or holding to such rules) vs principal (first in rank or importance; chief; main)
• programme (for a television broadcast, plan of activities, to instruct) vs program (as in a computer program)
α-helix
acknowledgement
acclimatiz*
adrenaline
adviser
aerofoil
ageing
amino acid (noun or adjective)
analogue
analys*
anti-cancer
antisense
antisymmetr*
anti-tumour
arcsin (in equations)
arcsine transformed (text)
artefact
backcross
behaviour
biased
bioactive
biogeographic
bioinspired
Biot–Savart
Birkhäuser
Bonferroni correction
Born–Oppenheimer
bumblebee
by-product
χ2-test
Cahn–Hilliard
Camassa–Holm
Carathéodory
carer
Cartesian
categoriz*
Cauchy–Riemann
Cauchy–Schwarz
CD4+
Cenozoic
centr*
characteriz*
chimpanzee
Clausius–Mossotti
Clearly,_
coaxial
coevolution
coexist
cofactor
co-infect
Cole–Hopf
collinear
Colorado
coloration
colour
commercializ*
Consequently,_
Conversely,_
cooperat*
coordinate
co-resolve
co-rotating
counterintuitive
covary
coverslip
co-worker
Crank–Nicolson
cross-link
cross-section (adjectival)
crystalliz*
cytochrome b
database
dataset
dependant (noun)
dependent (adjective)
diagonaliz*
diatomic
dimensionaliz*
disc (unless computer disk)
discretiz*
dispatch
dorsomedial
dorsoventral
downregulate
downwelling
e.g.
e-Science
Earth (the planet)
electro-osmosis
emphasiz*
endeavour
endpoint
eukaryote
Euler–Lagrange
evaporate
Evidently,_
evolutionarily (adverb)
evolutionary (adjective)
extracellular
factoriz*
faeces
favour
feedback (noun)
feed-forward
Fermi–Dirac
fetus
fibre
fibre-optic (adjectival)
fibr*
fieldwork
figure of eight
Finally,_
finite-element
Fisher’s exact probability
fishes
flavour
fluidiz*
flyby
focus
focus*
Fokker–Planck
fold
formalism
formaliz*
formulae
freeze–thaw
fruit fly
fulfil
fulfilled
fully
Furthermore,_
Gaussian
gelatin
GenBank
generaliz*
geo*
geographical (not geographic unless referring to a thesis)
geometriz*
Ginzburg–Landau
Golgi (apparatus)
Gram-negative / -positive (of a bacterium)
ground state
guinea pig
haemoglobin
haemopoiesis
haemopoietic
Hamilton–Jacobi
Hartree–Fock
Hashin–Shtrikman
healthcare
Hele-Shaw
Heriot–Watt
higher dimensional (adjectival)
Hilbert–Schmidt
histological (not histologic)
homogeneous
honeybee
honour
Hubble law
hunter–gatherer
i.e.
icecap
idealiz*
in situ
in vitro
in vivo
inflection
infrared
Internet
interspecific
ioniz*
judgement
Kelvin–Helmholtz
Kirchhoff
Kronian
label
labell*
least-squares (adjectival)
left-hand side
length-scale (adjectival)
Lennard-Jones
leucocyte
licence (noun)
license (verb)
life cycle
life-history (adjectival)
lifelong
lifespan
lifestyle
lifetime
lift-off (adjectival)
lineariz*
localiz*
lognormal
long-term (adjectival)
Lotka–Volterra
magnetiz*
man-made
manoeuvre*
markup
maximiz*
maximum-likelihood (adjectival)
maximum-parsimony (adjectival)
Maxwell–Boltzmann
Michaelis (constant)
microorganism
microstructure
midline
Millipore (filter)
minimiz*
model
modell*
monatomic
Monte Carlo (adjectival)
Moore's law
Moreover,_
mosquito (mosquitoes)
motor neuron
mouthbrooding
movable
multi-*
multicellular
nano-bit
nanoparticle
naive
Navier–Stokes
near shore
Nearctic
neighbour
nest-box
nest-mate
neuron
Nevertheless,_
Newton–Raphson
night-time (adjectival)
non-compact
non-decreas*
non-dimensional
non-dissipative
non-empty
non-equilibrium
non-exactness
non-homogeneous
non-hyperbolic
nonlinear
non-local
non-negativ*
non-parametric
non-principal
non-resonant
non-singular
non-standard
non-stationarity
non-stationary
non-symmetr*
non-trivial
non-uniform
non-vanishing
non-zero
normaliz*
northeast
Northern Hemisphere
northwest
note
Obviously,_
occur
occur*
oestradiol
offshore
On the other hand,_
online
optimiz*
organiz*
orthologue
palaeo*
parametriz*
per capita (italicise)
per cent
peri-operative
Perspex
Petri (dish)
phylogeographic
physico-chemical
pick-up (adjectival)
plasmodesmatal
Plasticine
Plexiglas
Poisson (distribution)
polariz
polynya
post-operative
Prandtl–Batchelor
pre-operative
Prisoner’s Dilemma
program (for computer program)
programme (for TV, events etc.)
prokaryote
proopiomelancortin
quasi-
railway
rainforest
rationaliz*
ratios
reaction–diffusion
reaction–relaxation equation
realiz*
Recently,_
recognize
reconnect
redox
regulariz*
reinforce
reisolate
retest
reuse (noun)
re-use (verb)
right-hand side
role
Runge–Kutta
savannah
sea-level (adjectival)
seashell
seawater
semi*
semicircle
semicircular
semi-free range (or e.g. semi-free-ranging females)
set-up (noun)
Shockley–Reed
so-called
solid-state (adjectival)
southeast
Southern blot
Southern Hemisphere
southwest
soya bean
space–time
spatio-temporal
stabiliz*
standardiz*
stress–strain
Stuart–Landau
Sturm–Liouville
subarctic
subcritical
sulfide
sulfur
summariz*
supersede
synthesiz*
Teflon
Therefore,_
three-dimensional (adjectival)
time-interval (adjectival)
time-scale (adjectival)
time-series (adjectival)
time-step (adjectival)
Tollmien–Schlichting
transferring
travel
travel*
tunnel
tunnel*
type I error
ultraviolet
underestimate
understorey
underway
unravelled
upregulate
use (not utilize)
van der Waals
vaporiz*
vapour
vapour trail
versus
visualiz*
von Neumann
wave function
wavefront
wavelength
wavenumber
wavevector
Web (as in World Wide Web)
website
Western (when referring to society)
western blot
while
Wiener–Hopf
Wilcoxon signed-rank test
wild-type (always hyphenate)
worldwide
X-ray
zeroth
zoogeograph*